This Harmony XB5 30 mm mushroom button is yellow and operates with a spring return / impulse mechanism. It has a round shape and a protective collar. This 30 mm mushroom-shaped push button head is ideal for situations where quick actions are required to ensure a process or machine operates correctly, or where the operator's movements demand maximum ergonomics. It easily combines with the contact blocks of the Harmony series to perform a variety of control functions. Its distinctive 30 mm mushroom shape makes it visually recognizable from a distance. With an IP66 protection rating, it is shock-resistant, dust-tight, waterproof, and vibration-resistant, making it perfect for use in harsh environments.